#include <iostream>
#include <time.h>
#include <exception>
#include <random>
#include <algorithm>

#include "Die.h"

using namespace std;

DieDynamic::DieDynamic(unsigned int  faces, int seed) {
    recording = false;
    if (seed < 0) {
       random_device rd;
       seed = rd();
    }
    generator = new mt19937(seed);

    if (faces > 1) {
        sides = faces;
    } else {
        cerr << "Error: Invalid number of sides: " << faces
             << ", setting sides to be 6" << endl; 
        sides = 6;
    }
}

DieDynamic::~DieDynamic() {
    if (recording) {
        outFile.close();
    }
}

int DieDynamic::Roll() {
    uniform_int_distribution<int> distrib(1, sides);
    int result{distrib(*generator)};
    if (recording) {
       outFile << result << " ";
       outFile.flush();
    }
    return result;
}

void DieDynamic::Record(string fileName) {
    if (not recording) {
       outFile.open(fileName);
       if (!outFile) {
          cerr << " Fail to open recording file " << endl;
       }
       recording = true;
    }
}

DieStatic::DieStatic(string fileName) {
     inFile.open(fileName);
     if (not inFile) {
        throw runtime_error("Die Class unable to open input file "+fileName);
     }
}

int DieStatic::Roll() {
    int rv;
    inFile >> rv;
    if (!inFile) {
       throw range_error("Die Static Class out of data in input file");
    }
    return rv;
}